# Agent: `opencode-task77-slice-a-20260222T000100Z-j4p2`

- alias: `opencode-task77-slice-a`
- mission: `Implement TASK-77 slice A parser-selection-stage module + focused tests without touching tokenizer.ts`
- status: `done`
- branch: `main`
- started_at: `2026-02-22T00:01:00Z`
- heartbeat_minutes: `5`

## Current Work (newest first)

- [2026-02-22T00:01:00Z] intent: extract pure parse-result selection logic from `src/core/services/tokenizer.ts` into new stage module and add focused tests for selection behavior.
- [2026-02-22T00:01:00Z] plan: write failing tests first in `src/core/services/tokenizer/parser-selection-stage.test.ts`, then add module `src/core/services/tokenizer/parser-selection-stage.ts`, then run targeted test command.
- [2026-02-22T00:03:30Z] complete: added pure parser selection stage module + helper exports and focused tests for scanning preference, mecab fallback split, and suspicious-kana tie-break; verified with `bun test src/core/services/tokenizer/parser-selection-stage.test.ts` (3 pass, 0 fail).

## Files Touched

- `docs/subagents/agents/opencode-task77-slice-a-20260222T000100Z-j4p2.md`
- `docs/subagents/INDEX.md`
- `docs/subagents/collaboration.md`
- `src/core/services/tokenizer/parser-selection-stage.ts`
- `src/core/services/tokenizer/parser-selection-stage.test.ts`

## Assumptions

- TASK-77 already exists in Backlog (`task_search` hit confirmed).
- Slice A should preserve existing behavior from tokenizer parse candidate selection path only.

## Open Questions / Blockers

- None.

## Next Step

- Handoff complete.